Brake assembly



J. SNEED BRAKE AS S EMBLY April 29, 1930.

Filed June 18, 1928 Patented Apr. 29, 1930 UNITED STATES PATENT ornca groan sxnnn,

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ends of which engage opposite ends-of the v brake shoe whereby the ends of the shoe are spread apart durm braking enga ement. The ends of the togg e do not enga e t e shoe directly but are carried bylateral y extending thrust pins, whichpins. are su orted at their ends, for example, by the s1 e flanges of the channeled end of the shoe. The pms are preferably free to rotate with relation of the side flanges of the shoe to facilitate universal movement between-the shoe and the toggle. Heretofore, these pins have been he against lateral movement relative to the shoe 'by such means as cotter pins.

It isamong the objects of my invention to p secure these ins against lateral movement in the ends ofthe shoe'by means which may be more quickly assembled than ,thelcotter pins and which have ater life and are less susce tible to failure y breakage. Ot or objects will appear from lowing description of a preferred form of my invention, reference bein had to the accompanying drawings. v e essential charso acteristics are summarized in the claims.

In the drawings, Fig. 1 is a partial elevation of a shoe including the'toggle spreading mechanism; Fig. '2 is a section taken 1 along the line 2-2 of Fig. 1; Fi 3 is a side view of one of the thrust ins; ig. 4 is anend view of the same and ig. 6 is a top view thereof; Fi 6 is a partially broken section of one of t e retaining members before assembly; Fig.- 7 illustrates the same member after assemblyand Figs. 8 and 9 illustrate steps in assem ling the pins and retaining members.

Referring to Fig. 1, there is illustrated a fraigmentary elevation including the shoe en s of the. brake, which is [more escribed in my co-pending ap lication, erial No. 261,760, filed March 15t 1928. Briefly my' invention may be illustrated in connection with a brake havin a brake drum D, a

shoe S which is chann'e ed inseotion at one which togg the fol-- v "have reduced en portions 31 with adjacent jacent the anchor throu h which the reduced.

192a. serial no. 286,154

end (see also Fig. An anchor pin P is .provldedagainst which the shoe ends abut. 2 v One of theends of the shoe may have an adjusting device A with depending spaced ears 5 and-6 as illustrated in my co-pending application.

To spread either end" away from. the an chor, a toggle T is shown (see also Fig. 2) ,emaiy be engaged in its mid-portion b a yoke. which is drawn by acable C to atten the toggle and spread the ends of the shoe apart. The toggle com rises a palr of armjs110 and "11, the, ends, 0 which straddle pins 20 which are pivotally mounted in the respective ends of the shoe and extend parallel to the anchor pin. In each of the pins 20, I provide vertically'extending ins 22 which are'en aged by bifurcated end s of the toggle. so t at -universal movement is rovided between the to gle and either end of the shoe. Referring a so to Figs. 3, 4 and 5, the up r and lower sides of'the pins 20 maybe arms 10 and 11 may have flattened bearing surfaces on the'top and bottom of the pins. The pins 20 ma be similar inform and may shoulders 82. An aperture 33 is formed in the side flange ofthe channel part of the shoe ad-.-

end' portion 31 of the p1n 20 extends so that one end of the pin contactswith the apron as at 34 and the shoulder 32 engages the inner side of the flan e of the shoe. The pin, which is carried by t e adjustin member, contacts with the a mu at 35. and is similarly su ported. "T us'the pins space the sides of t e ends of the shoe from the apron. Referring. articularly to Figs-3 to 9,'the L side flange o the channel remote from the apron hasan opening with a diameter as great as the greatest diameter ofthe in through which the pin may be passed. w on the parts are assembled: Thus in Fig. 8'the .portions' '31 attending through the aperture 33 and with the other reduced lend" portion liing'in the opening 50 but" not supported t ereby. With the parts in this position the cupped-like member 40 is inserted into the attened as at 24 so that the toggle annular space betweenthe reduced end p01,-

.' tion 31' and thewalls of the opening and from this position is forced or pressed with its brimv against the shoulders" 32 of the pin so that its brim is flared outwardly as at 41 until it assumes the sha shown in Figs. 2 and 7. Because of the attened portions 24 on the pins the shoulders 32 may not be uniform (see Fig. 4) and a removable man- 'drel (see Fi 9) may be used to facilitate flaring the rim of the retaining mem As illustrated in Fig. 2, similar operation with similar parts secures the other pin between the depending ears5 and 6 of the ad-' j-usting mom.

or A. The pins ar e'held at one end b. directl-contact between the shoulders and t e inner sides of the flanges and at the.

other end by the shoulders acting through the members40. The retaining members '40 having once been driven 'to position hold the pins against lateral movement and support the pinswhile' permitting rotation between in the art an 'to the specific structural details shown or in I them and the ends of the shoe.

While the foregoing is a description of the preferred form of my invention, changes within its sco e may occur to those skilled I do not care to be limited any manner other than by the claims appended hereto.

I claim v I 1. The combination of a brake shoe having spaced parallel thrust parts with aligned openings therein, a thrust member supported at its ends in said openings, and a retainin .member having side walls engaging the wal of one ofsaid' openings and having an outwardly flared brimof greater diameter than said 0 ening.

'2. e combination of a brake shoe having spaced parallel thrust parts with aligned openings therein, a thrust member supported at its ends in said openings, and a retainin member having side walls engaging the wal of one of said openings and having an outwardly flared br m of greater diameter than "said 0 ening, said brim being disposed adja-' cent t e face of one of the parts and in the space between." the parts.

3. The combination of a channeled brake shoe having side flanges with aligned opentherein, a thrust pin supported at its m s ens in said openings and having at least one end portion of less diameter than the diameter of the opening with which it is associated and having shoulders adjacent its reduced end'portion and adjacent said opening,

' within said opening'an and a cup-shaped retaining member overlying said'reduced end (portion and disposed having an outwardly flared brim of eater. diameter than .said opening lyini a 'acent said shoulders.

4. In a bra e, t e combination of a friction device having spaced thrust parts with 5. T e combination of a channeled brake shoe having side flanges with aligned openings therein, a thrust pin journalled at its ends in-said openings and having at least one reduced end portion of greater length than the thickness of the flange with which it is associated and having shoulders adjacentits reduced end portion bearing on the inner face of the flange whereby part of the reduced end portion extends beyond the side of the flange and constitutes a steady rest for the shoe.

6. In a brake, the combination of a friction device having spaced thrust parts with aligned openings a thrust in with at least one reduced end portion onger than the thickness of the thrust parts and pivotall mounted in one of saidopenings and extend ing beyond the face of said thrust part and comprising a steady rest for the friction device, and means for securing the other end of said pinin the other of said openings and holding it against longitudinal. movement relative to said thrust parts.

7. In a brake, the combination of a friction device having .spaced parallel-thrust parts with aligned openings of different diameter, a thrust pin having reduced end portions of like diameter sup orted in said opening,"said pin having shou ders adjacent its reduced end portions, one of said reduced portions fittin in one of said openings with the s'houl ers of the pin 1 ing against one of said thrust parts, t e other. of said reduced end portions extendin in the greater of said openings and spaced rom the walls thereof with the shoulders of said pin spaced from. the face of the other of said thrust parts and a cup-shaped retaining member. havin its inner-walls engaged by the last named re uced end portions and having its outer walls closely fitting in said lastnamed opening and having its brim flared outwardly against said last named shoulder to a great:

er diameter than'said opening.

wherein the larger of said openings has a diameter substantiallyequaLto the greatest diameter of said pin whereby the rts may be assembled by first passing said pin .thr oug the greater of said openings. v

9. In a brake, the combination of a friction device having spaced parallel thrust parts with aligned openings of different diameter,

8. The combination according to claim 7 a thrust pinhaving reduced end portions of like diameterand difi'erent length and supported in said opening, said pin having shoulders adjacent at least the longer of said reduced end portions, the longer of said reduced portions fitting in one of said openings with the shoulders of the pin lying against one of said thrust parts and extending beyond the friction device and comprising a steady rest therefor, the other of said reduced end portions extending in the greater of said openings and spaced from the walls thereof, and a cup-shaped retaining member having its inner walls engaged by the last named reduced end portions and having its outer walls closely fitting insaid last named opening and having its brim flared outwardly against the inner face of the thrust part to a greater diameter than said opening.

10. In a brake, the combination of a friction device having spaced inwardly extending thrust'parts, a laterally extending thrust pin pivotally mounted in said parts, one end of said pin being pivotally mounted in one of said parts and the other end of said pin being pivotally secured in the other of said parts, and a retaining member for securing said-last named end having a cup-shaped body and an outwardly flared brim, the brim being formed when the member is pressed onto said pin and having a greater diameter than the body of said pin.

. 11. In a brake, the combination of a friction device having spaced inwardly extending thrust parts with aligned openings, a

laterally extending thrust pin carried by said parts, one end of said pin being pivotally mounted in one of said parts and the other end of said pin being secured in an opening in the other of said parts, said pin being of substantially the same diameter as the opening, and a retaining member for securing said last named end having a cup-shaped body and an outwardly flared brim, the brim being formed when the member is pressed onto said pin and having a greater diameter than the opening.

12. In a brake, the combination of a shoe having inwardly extending side flanges with aligned openings, a thrust pin having its ends supported in said openings, said thrust pin having shoulders at one end bearing against the inner face of one of said side flanges and a cup-shaped retaining member for the other of said openings and beyond the side of theshoe and into contact with said apron for spacing the shoe from the apron, and a retaining member for the other end of said member having walls acting as a bushing within the opening of the other side flange and a part deformed when the retaining member is forced over the end of the thrust pin to a greater diameter than said opening and'supporting the adjacent end of said pin andholding the other end of said pin in contact with said apron and spacing the shoe from the apron.

14. In a brake having an apron and a shoe with parallel inwardly extending side flanges 'other side flange with a part deformed when the retaining member is forced over the end of said pin to a greater diameter than said opening and supporting the adjacent end of said pin and holding the shoulders at the other end of said pin in contact with the first named side flange and spacing the shoe. from the apron.

In testimony whereof, I hereunto affix my JOHN SNEED.

signature.

end of said pin adapted to be forced over the end of said in and deformed while being forced over the end of the pin to engage the inner side of the other of said flanges, the bottom of said cup-shaped member engaging the other end of said pin and holding said shouligers against the inner side of said first named ange.

13. In a brake having an apron and a shoe with parallel inwardly extending side flanges having aligned openings, one of said side 

